Changes in Makefile

127b0e05 - vdso: Rename included Makefile

Tue, 04 Feb 2025 12:05:36 +0000

vdso: Rename included MakefileAs the Makefile is included into other Makefiles it can not be used todefine objects to be built from the current source directory.However the generic datastore will introduce such a local source file.Rename the included Makefile so it is clear how it is to be used and tomake room for a regular Makefile in lib/vdso/.Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-4-13a4669dfc8c@linutronix.de List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

36b2f3ae - parisc: add vdso linker script to 'targets' instead of extra-y

Sat, 21 Dec 2024 06:16:18 +0000

parisc: add vdso linker script to 'targets' instead of extra-yThe vdso linker script is preprocessed on demand.Adding it to 'targets' is enough to include the .cmd file.This commit applies the previous change to parisc, which added thevdso support after commit 887af6d7c99e ("arch: vdso: add vdso linkerscript to 'targets' instead of extra-y").Signed-off-by: Masahiro Yamada Acked-by: Helge Deller Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

e23d9c0b - parisc: Add 32-bit gettimeofday() and clock_gettime() vDSO functions

Tue, 18 Jun 2024 23:42:28 +0000

parisc: Add 32-bit gettimeofday() and clock_gettime() vDSO functionsAdd vDSO implementations for gettimeofday(), clock_gettime() andclock_gettime64() kernel syscalls.Currently those functions are implemented as pure syscall wrappers.Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

b1992c37 - kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Sat, 27 Apr 2024 14:55:02 +0000

kbuild: use $(src) instead of $(srctree)/$(src) for source directoryKbuild conventionally uses $(obj)/ for generated files, and $(src)/ forchecked-in source files. It is merely a convention without any functionaldifference. In fact, $(obj) and $(src) are exactly the same, as definedin scripts/Makefile.build: src := $(obj)When the kernel is built in a separate output directory, $(src) doesnot accurately reflect the source directory location. While Kbuildresolves this discrepancy by specifying VPATH=$(srctree) to search forsource files, it does not cover all cases. For example, when adding aheader search path for local headers, -I$(srctree)/$(src) is typicallypassed to the compiler.This introduces inconsistency between upstream and downstream Makefilesbecause $(src) is used instead of $(srctree)/$(src) for the latter.To address this inconsistency, this commit changes the semantics of$(src) so that it always points to the directory in the source tree.Going forward, the variables used in Makefiles will have the followingmeanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source treeConsequently, $(srctree)/$(src) in upstream Makefiles need to be replacedwith $(src).Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

b957df3b - arch: use $(obj)/ instead of $(src)/ for preprocessed linker scripts

Sat, 27 Apr 2024 14:54:59 +0000

arch: use $(obj)/ instead of $(src)/ for preprocessed linker scriptsThese are generated files. Prefix them with $(obj)/ instead of $(src)/.Signed-off-by: Masahiro Yamada Acked-by: Helge Deller Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

72a9913a - parisc: vdso: remove unused C build rule in vdso32/Makefile

Sat, 30 Mar 2024 10:08:48 +0000

parisc: vdso: remove unused C build rule in vdso32/MakefileThe build rule for C is unused because 'obj-cvdso32' is not definedin this Makefile.If you add a C file into arch/parisc/kernel/vdso32/ in the future,you can revert this commit. The kernel does not keep unused code.Signed-off-by: Masahiro Yamada Acked-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

9086e601 - parisc: Add missing FORCE prerequisites in Makefile

Sat, 17 Dec 2022 19:05:43 +0000

parisc: Add missing FORCE prerequisites in MakefileFix those make warnings: arch/parisc/kernel/vdso32/Makefile:30: FORCE prerequisite is missing arch/parisc/kernel/vdso64/Makefile:30: FORCE prerequisite is missingAdd the missing FORCE prerequisites for all build targets identified by"make help".Fixes: e1f86d7b4b2a5213 ("kbuild: warn if FORCE is missing for if_changed(_dep,_rule) and filechk")Signed-off-by: Helge Deller Cc: # 5.18+ List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile

df24e178 - parisc: Add vDSO support

Wed, 08 Dec 2021 10:06:52 +0000

parisc: Add vDSO supportAdd minimal vDSO support, which provides the signal trampoline helpers,but none of the userspace syscall helpers like time wrappers.The big benefit of this vDSO implementation is, that we now don't needan executeable stack any longer. PA-RISC is one of the lastarchitectures where an executeable stack was needed in oder to implementthe signal trampolines by putting assembly instructions on the stackwhich then gets executed. Instead the kernel will provide the relevantcode in the vDSO page and only put the pointers to the signalinformation on the stack.By dropping the need for executable stacks we avoid running into issueswith applications which want non executable stacks for security reasons.Additionally, alternative stacks on memory areas without execpermissions are supported too.This code is based on an initial implementation by Randolph Chung from 2006:https://lore.kernel.org/linux-parisc/4544A34A.6080700@tausq.org/I did the porting and lifted the code to current code base. Dave fixedthe unwind code so that gdb and glibc are able to backtrace through thecode. An additional patch to gdb will be pushed upstream by Dave.Signed-off-by: Helge Deller Signed-off-by: Dave Anglin Cc: Randolph Chung Signed-off-by: Helge Deller List of files: /linux-6.15/arch/parisc/kernel/vdso32/Makefile